WP 805-A was purchased to power Western Pacific Railroad's portion of the California Zephyr run less than one year after the train began on March 20, 1949.[1] The 805-A was built in 1950 as part of an order by WP for 6 new passenger locomotives: 4 cab equipped A units numbered 804-A, 804-C, 805-A and 805-C, and 2 B units numbered 804-B and 805-B. These locomotives supplemented WP's existing fleet of F3 models, which were the original power for the CZ train.
This cab unit, which would be joined by two cabless B units in a typical CZ motive power set, hauled the train from Oakland, California, to Salt Lake City, Utah, from 1950 until March 22, 1970, when the CZ ended.[1] The 805-A was then placed into freight service.
The Feather River Rail Society (FRRS) wanted this locomotive for its Western Pacific Railroad collection as it had become the last WP California Zephyr locomotive in existence. Arrangements were made to purchase the locomotive in 1987 with the cost shared between members Steve Habeck, Larry Hanlon, and John Ryczkowski. FRRS joined as the fourth partner in the purchase.
The 805-A was cosmetically restored by Bill Evans and David Dewey. With this work completed, a rededication ceremony was held on May 27, 1995.[1]
In early 2000, the FRRS launched the Zephyr Project to raise money for a complete mechanical restoration of the 805-A and restoration of the CZ dome car Silver Hostel.[1] In 2004, the locomotive returned to limited operation. The 805-A is the last, intact locomotive built specifically for the CZ.